Rust generics

Generics allow you to abstract a function so that it accepts a range of types.
Functions, Structs, Enums etc. can all be expressed as generics

Basics

// everywhere 'T' shows up, it represents the type.
struct Coord<T> {
    x: T,
    y: T,
    z: T,
}

let c = Coord{1, 2, 3};   // valid
let c = Coord{1, 2u8, 3}; // invalid! 1/3 are i32, but 2u8 is a u8.

Use as many generic types as you'd like within a signature,
they are not limited to a single character.

struct Coord<XVAL, YVAL, ZVAL> {
    x: XVAL,
    y: YVAL,
    z: ZVAL,
}

Require Trait Implementor

You can also require that an object implements a specific trait. See more details in rust traits

Implements single trait

fn play_with_pet<P: Pet>(pet: P) -> bool {}

Implements multiple traits

// with impl
fn play_with_pet(pet: &(impl Pet + Display)) -> bool {}

// with where clause
fn play_with_pet<P>(p: P) -> bool
where
    P: Pet + Display
{}